On the role of global flow instability analysis in closed loop flow control

Sierra Gomez, Francisco; Theofilis, Vassilios; Paredes Gonzalez, Pedro; Liu, Qiong y He, Wei (2012). On the role of global flow instability analysis in closed loop flow control. En: "6th AIAA Flow Control Conference", 25-28 Jun, New Orleans, Louisiana.

Descripción

Título: On the role of global flow instability analysis in closed loop flow control
Autor/es:
  • Sierra Gomez, Francisco
  • Theofilis, Vassilios
  • Paredes Gonzalez, Pedro
  • Liu, Qiong
  • He, Wei
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 6th AIAA Flow Control Conference
Fechas del Evento: 25-28 Jun
Lugar del Evento: New Orleans, Louisiana
Título del Libro: Flow Control Conference, Fluid Dynamics and Co-located Conferences
Fecha: 2012
Materias:
Escuela: E.U.I.T. Aeronáutica (UPM) [antigua denominación]
Departamento: Física y Química Aplicada a la Técnica Aeronáutica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Control of linear flow instabilities has been demonstrated to be an effective theoretical flow control methodology, capable of modifying transitional flows on canonical geometries such as the plane channel and the flat-plate boundary layer. Extending the well-developed theoretical flow control techniques to flows over or through complex geometries requires addressing the issue of efficient capturing of the leading members of the global eigenspectrum pertinent to such flows. The present contribution describes state-of-the-art modal global instability analysis methodologies recently developed in our group, based on matrix formation and time-stepping, respectively. The relative performance of these algorithms is assessed on the recovery of BiGlobal and TriGlobal eigenspectra in the spanwise periodic and the cubic lid-driven cavity, respectively; the adjoint eigenspectrum in the latter flow is recovered for the first time. For three-dimensional flows without any homogeneous spatial direction, the time-stepping methodology was found to outperform the matrix-forming approach and permit recovering the leading TriGlobal eigenmodes in an three-dimensional open cavity of aspect ratio L : D : W = 5 : 1 : 1; theoretical flow control of this configuration is underway.

Más información

ID de Registro: 36590
Identificador DC: http://oa.upm.es/36590/
Identificador OAI: oai:oa.upm.es:36590
URL Oficial: http://arc.aiaa.org/doi/abs/10.2514/6.2012-2679
Depositado por: Memoria Investigacion
Depositado el: 29 Ene 2016 11:11
Ultima Modificación: 29 Ene 2016 11:11
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